Rope structure



Patented Feb. 1923. I

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' Application fiieaeaimar 10, 1923. Serial No. 611,898.

To all-whom, it caitcem I I 1 3e it known that I; FELIX RIESENBERG, a c1t1zen'of -the United States, and a. resident ofiTuckalioe, in' the county of \Vestchester and State of NevvYork, have invented a new and Improved Rope Structure, of which the following is a full, clear, and exact description.

multiplicity of not of the same the same tension, also certain of the strands The present invention relates to new and.

useful improvements in cordage, and it pertains more particularly to a new and improved method of making rope.-

The application is a continuation in part of the application Serial No. 566,240, filed January 6, 1922.

It has' been foundby experiment that in the larger sizes of rope the great increase in the number of yarns comprising each strandof the rope results in a los of the effective strength of the individual yarns. It has also been found that-as the rope increases in size the strength per pound of yarn used per foot of rope gradually decreases as the diameter of the rope increases. This is due to the fact that where a, great yarns are employed, all are length and hence not under are subjected to strain prior to others, and, therefore, the several strands cannot perform their functions simultaneously.

' It is one of the primary objects of thein- .vention to provide a rope in which a more even distribution of the work performed by the individual'elements of which the rope is formed may bed ad.

' It is a furcher object of the invention to form a rope in which greater strength above certain predetermined sizes may be had than is possible in ropes of corresponding sizes manufactured in the form common to the manufacture of cordage atthe present time.

It is a further object of the invention to obtain greater flexibility in the largersizes of rope. It is a further object of; the invention to provide a new and improved strand for ropes, which strand may be employed in the manufacture of-three, four or more stranded construct a rope in such a manner that the internal friction thereof will reduced.

It is a further object of the'mventlon to so iiz is a further object of the inventionto Figure 2 IS a transverse sectional view ofcw, v ing drawone of the. strands of the rope.

Referring more, particularly to the .drawings, the reference character 11 designates the. rope and saidrope comprises in the BEsTAvAiLAeLE-coPy present illustration three strands 12. While the illustration shows a rope comprising three strands, itis obvious that any number of strands common in=the manufacture of rope may beemployed.

In carrying out the invention, each of the strands 12 comprises a core 13'cnclosed in a wrapping of yarns 14. The cores 13 are each composed of a plurality of elemental?) and said elements 15 are intertwined to form a single unit. It will benoted that the intertwined strands are in'clbse contact along the axial line, of the core they constitute.

While in the present instance the-cores 13 are shown as consisting of three elements, it is obviousthat two "or more elements may be employed in the manufacture of the core when so desired. It will be noted, therefore,

that'in the present instance a doublei layer of yarn 141s employed as around each. of the cores 13, but it is obvious that yarns 14 may be employed in a single layer or in more than two layers, as desired.

In the manufacture .of very large rope wherestra nds of large diameter are emeasily handled. Furthermore, by constructing a rope in accordance with this principle,

j I 1 .445956 BEST AVAILABLE CQ gl'eater s tr'ength is had jthan'; is possible. Wherethe lmllvidual strands 12' a-re'fox med.

from yarns as is' the common practice.

Iclaim: 3 A compdsltohope .whereirl the tensile strength of the rope isthe combined '-.strength of its several elements, said rope comprising a, plurality of Strands twlsteil together and eaqh stl zin l consistlngnfa co're composed of Vegetable fibre elements mtertwined and laid and i'st-ing permanentlyin rpurposo'set-forth. l l FELIX RII lSENBERG.

close t w h elemenfl with e arh bthh vilementilmig axial line of the core, and apmtectwe covermgalso of \-'egetable.hbre

placed hllcally about the 'vegetahle fibre .coi'e, the tensile strengthof the covering con 'tltuting a material part of the total tensue strength of thg rdpe and the core and the! coveringcooperatlng toward inereaziing the flexibility of the rope, ns and for; the 

